Home / 20,747.80-31,125.70-8,901.40

Finding the Fourth Proportional to 20,747.80, 31,125.70 and 8,901.40

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Solution

The fourth proportional to 20,747.80, 31,125.70 and 8,901.40 is: 13,353.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.80 : 31,125.70 = 8,901.40 : x
  2. Step 2: Convert to fraction form
    20,747.80/31,125.70 = 8,901.40/x
  3. Step 3: Cross multiply
    20,747.80x = 31,125.70 × 8,901.40
  4. Step 4: Simplify right side
    20,747.80x = 277,062,305.98
  5. Step 5: Solve for x
    x = 277,062,305.98/20,747.80
  6. Step 6: Final answer
    x = 13,353.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.